Hatchway-gate for elevators



(No Model.)

O. M. GREENMAN. HATGHWAYG ATE FOR ELEVATORS.

Patente May 1, 1888.

wwwaooeo a wbg UNITED STATES PATENT OFFICE.

OORWIN M. GREENMAN, OF WYANDOTTE, KANSAS. I

HATCHWAY -GATE FORELEVATORS.

SPECIFICATION forming part of Letters Patent No. 382,037, dated May 1,1888.

Application filed December 5,1887. Serial No. 256,981. (No model.)

ings, forming a part hereof.

This invention relates to mechanism for guarding the hatchways of orapproaches to elevatorsjand it may be said to consist in the devices andthe peculiar combination, construction, and arrangement of deviceshereinafter set forth, and pointed out in the claim.

In the drawings, which illustrate the manner of carrying out myinvention, Figure 1 is a broken side elevation of an elevator to whichmy invention has been applied. Fig. 2 is a broken end View of same. Fig.3 is a detail sectional view illustrating the operation of a doubleinclined plane used in making up the invention, the section beingtakenon line a; w, Fig. 2. Fig. 4 is a detail view in perspective of anarm used in making up the invention. Fig. 5 is a detail view inperspective of a link that is used to connect the arm and the doubleinclined plane, and Fig. 6 a detail sectional nal slot or opening, E, inwhich said inclined plane operates.

The lower end of said plane is provided with a series of apertures, d,and is pivoted to said post by means of pin 0, which is passed throughany one of said series of ap ertures that may be desired.

Extending across one end of the hatchway is a rock-shaft, H, whichcarries an arm, F, and suitable bars or gates. The upper end of theinclined plane D is connected to arm F by means of link G, so that whensaid inclined plane is pushed outwardly by the upward and downwardmovements of the car or platform the roller 0 will engage the inclinedportions of the plane and raise the gate or gates, as

shown more clearly by dotted lines in Fig. 1.

To present a larger bearing-surface for the face of roller 0, I preferto form the inclined plane D of a metallic sheet and turn its inner edgeover at a right angle to its main body, or, in other words, form aflange, e, on its inclined edge. This provides a comparatively broadtrack upon the edge of the plate for engagement with said roller. Bysetting the lower end of the inclined plane D farther in, by means ofseries of apertures d in its lower end, the stroke of said plane may bevaried, thereby raising the gate to a greater or less height, as may bedesired; also,-by connecting the outer end of link G to a differentaperture of the series of apertures b, formed in the arm F, the heightto which the gate is raised may be varied.

It will be observed that the gate or gates I are fixed at one end to theshaft H, so that during operation their outer ends will describe the arcof a circle.

When the roller 0 becomes disengaged from the inclined plane D duringoperation, the gates I may either drop into a closed position bygravity, or a suitable coiled spring, a, may be connected to said gate,so as to permanently tend to close it, as shown.

It will be observed that the plate D is pro vided with a straight orflat portion, 20, at about the middle of its length, and it will also beobserved that said straight portion is ar 'ranged substantially in thesame plane as is the floor B of the building, so that when the roller 0engages the straight portion 20 the (platform B, the roller, and thefloor will each be in about the same plane, and the gates will be heldup or open as long as the parts are in such position.

An additional function of the straight portion on plate D is to permitthe platform B to bestopped a little above or a little below the floor Band yet hold the gate in an open position, thus dispensing withoverexactness in stopping and starting the platform, which is much to bedesired.

Of course it should be evident I may use but a single gate in somecases, cutting off the shaft H close up to the post E; or I may extendsaid shaft across the hatchway and locate another gate there and have itguard the op posite side of the hatchwa'y, and yet both gates will beoperated by the action of the single roller 0, as I here show.

It will be observed that the double inclined plane D extends an equaldistance above and below the building-floor B, so that it may be engagedby the platform in passing either up or down.

Having thus described my invention, what I claim is- The combination ofa double inclined plane having a straight portion at the middle of itslength, and arranged in the elevator-hatchway so that said straightportion will be opposite the floor of the building,said plane beingpivoted at its lower end, so that its upper end may vibrate in avertical plane, a rock-shaft extending at OORVVIN M. GREENMAN.

\Vitnesses:

S. S. MoRnHoUsE, F. G. FISCHER.

